Науковий вісник НГУ

Development prospects of vertical joints of large diameter deep-water pipes (risers). Bayonet connections of risers

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Category: Geotechnical and mining mechanical engineering, machine building

Last Updated on 14 August 2013

Published on 13 November 2012

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Authors:

T.A. Kuznetsova, Cand. Sci. (Tech.), Associate Professor, State Higher Educational Institution “National Mining University”, Senior Lecturer of the Department of Machinery Design Bases, Dnipropetrovsk, Ukraine

A.P. Ziborov, Cand. Sci. (Tech.), Associate Professor, State Higher Educational Establishment “National Mining University”, Senior Lecturer of the Department of Mining Engineering, Dnipropetrovsk, Ukraine

L.I. Chernukha, State Higher Educational Institution “National Mining University”, Engineer, Head of Laboratory, Dnipropetrovsk, Ukraine

T.G. Skvortsova, State Higher Educational Institution “National Mining University”, Student, Senior Laboratory Assistant of the Department of Open Cast Mining, Dnipropetrovsk, Ukraine

Abstract:

Purpose. To develop new variants of bayonet pipe connections which will include special additional elements assuring tension in order to prevent disconnection of deep-water pipes and allowing fast mounting and dismounting.

Methodology. Studies were carried out on the basis of critical analysis of about 1200 national and foreign patent constructions, scientific generalization and systematization of constructions corresponding to the pipe connection requirements.

Findings. The selecting criteria of necessary constructions to analyze were: easiness of mantling and dismantling at high loads and multiple assembling and disassembling, which is very important in difficult operating conditions caused by the change of the vertical load due to sea waves. Therefore bayonet connections appeared the most acceptable for use in such conditions as they provide fast installation and removal of pipe compositions with the small number of connection parts. However, the bayonet connections have some disadvantages, for example, impossibility of initial stress creation. Thus possibility of self-disconnecting brings into question the rationality of use of the bayonet connection without its design improvement. We can achieve the initial stress creation by introduction of an additional special element in the bayonet connection which will decrease the possibility of self-disconnecting.

Originality. To provide intensity of the bayonet connections we suggest using elastic rings, disc springs placed in the space between the face ends of pipe sections or union threaded bushing screwed on the nipple end of the pipe section and therefore squeezing the bell-mouthed end of the connection section.

Practical value. Developed variants of bayonet pipe connections can be implemented into offshore drilling equipment used in petroleum and gas industry, provide state of tension and prevent disconnection of deep-water pipes.

References:

1. Перспективы развития соединений вертикальных глубоководных труб большого диаметра (райзеров). 2. Резьбовые соединения райзеров / Кузнецова Т.А., Зиборов А.П., Чернуха Л.И., Марьенко В.Н. // Науковий вісник Національного гірничого університету.– Дніпропетровськ, 2010.– №6.– С. 69–75.
Kuznetsova, T.A., Ziborov, A.P., Chernukha, L.I. and Marenko, V.N. (2010), “Prospects for development of joints of deep-water vertical pipes of large diameter (reisers). Threaded connections of raisers”, Naukovyi visnyk Natsionalnoho hirnychoho universytetu, no.6, pp. 69–75.

2. Перспективы развития соединений вертикальных глубоководных труб большого диаметра (райзеров). 1. Разработка требований к трубным соединениям / Кузнецова Т.А., Зиборов А.П., Чернуха Л.И., Захаренко В.А. // Науковий вісник Національного гірничого університету.– Дніпропетровськ, 2010.– №5.– С. 84–89.
Kuznetsova, T.A., Ziborov, A.P., Chernukha, L.I. and Zakharenko, V.A. (2010), “Prospects for development of joints of deep-water vertical pipes of large diameter (reisers). Development of requirements for pipe joints”, Naukovyi visnyk Natsionalnoho hirnychoho universytetu, no.5, pp. 84–89.

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